منابع مشابه
Quantitative Isolation of Sterols.
I n 1909, Windaus published the important discovery that cholesterol, sitosterol, and P-cholestanol form sparingly soluble addition compounds with digitonin, whereas a-cholestanol and cholesterol esters do not (1). Ever since, this reaction has been a major tool of steroid chemists; it has been used in many methods for cholesterol determination and in many separations of steroids with the beta ...
متن کاملAllergenic pollen and pollen allergy in Europe.
The allergenic content of the atmosphere varies according to climate, geography and vegetation. Data on the presence and prevalence of allergenic airborne pollens, obtained from both aerobiological studies and allergological investigations, make it possible to design pollen calendars with the approximate flowering period of the plants in the sampling area. In this way, even though pollen produc...
متن کاملElectrophoresis of Sterols
The electrophoretic behavior of powdered ergosterol crystals is identical with that previously found for cholesterol within the limits of experimental error. Evidence for an adsorption hypothesis is presented to explain this phenomenon.
متن کاملThe biosynthesis of sterols in higher plants.
1. [2-(14)C]Mevalonate was incorporated into squalene and the major phytosterols of pea and maize leaves; it was also incorporated into compounds belonging to the 4,4-dimethyl and 4alpha-methyl steroid groups and which may be possible phytosterol intermediates. 2. l-[Me-(14)C]Methionine was incorporated into the major sterols and also into the 4,4-dimethyl and 4alpha-methyl steroid groups. No r...
متن کاملPollen and Pollen Tube Proteomics
Germinated pollen grains form pollen tubes that accomplish rapid polarized growth within female gametophytic tissues in order to deliver the sperm cell to the ovule. This process is essential for successful plant fertilization in vivo. Pollen tubes are considered to be an ideal model system to study tip growth. A more comprehensive understanding of proteins involved in pollen development, germi...
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ژورنال
عنوان ژورنال: Acta Chemica Scandinavica
سال: 1968
ISSN: 0904-213X
DOI: 10.3891/acta.chem.scand.22-2161